Making this a precondition – in essence requiring the Palestinian Authority to abandon calls for the right of return of Palestinians ousted from Israeli territory, will probably put the kibosh on any potential deal. The assurances that Hamas, which won the last Palestinian election, couldn’t gain control over the West Bank would likely appeal to the rival Fatah faction, but coming into the negotiations with demands of who is and is not allowed to government is hardly a recipe for an independent Palestine, and would likely alienate the population even further.